Dyeing here is mostly small.
I mostly use what grows here. But yesterday there was fresh turmeric at the market. We consume a lot of turmeric. I used to grow it in pots. Haven't done that in a while, since the organic market open up nearby.
Just slow solar dyeing mostly this spring I think. With a bit of alum, which I almost never use, but there is some here to be used up. Boil water, add a bit of alum add plant stuff. Some scrap and thread. Leave it for a while.
I'm not much for yellow, especially bright yellow but yellow is a great base to dye over. And many plants yield yellow in one form or another.